Preferential orientation of diamond formation on TaC: Diamond(111)//TaC(111)

Shaohua Lu; Xiongtao Zhang; Yuhao Zheng; Meiyan Jiang; Chengke Chen; Xiaojun Hu

doi:10.1080/26941112.2023.2300764

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Preferential orientation of diamond formation on TaC: Diamond(111)//TaC(111)

Research Article | Updated：2025-01-22

- Preferential orientation of diamond formation on TaC: Diamond(111)//TaC(111)
- Functional Diamond Vol. 4, Issue 1, (2024)
- Affiliations：
  
  1. a College of Materials Science and Engineering Zhejiang University of Technology Hangzhou People’s Republic of China
  2. b Moganshan Diamond Research Center De Qing Hu Zhou People’s Republic of China
  3. c Diamond Joint Research Center for Zhejiang University of Technology and Tanghe Scientific & Technology Company De Qing
- Author bio：
- Funds：
- DOI：10.1080/26941112.2023.2300764
  CLC：
- Online First：04 March 2024，
  
  Published：2024
- Accepted：
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Shaohua Lu, Xiongtao Zhang, Yuhao Zheng, et al. Preferential orientation of diamond formation on TaC: Diamond(111)//TaC(111)[J]. Functional Diamond2024, 4(1).
DOI：

Shaohua Lu, Xiongtao Zhang, Yuhao Zheng, et al. Preferential orientation of diamond formation on TaC: Diamond(111)//TaC(111)[J]. Functional Diamond2024, 4(1). DOI： 10.1080/26941112.2023.2300764.

摘要

Abstract

Experimental results showed that for the diamond film prepared by hot filament chemical vapor deposition (HFCVD) using Ta filament

TaC existed between diamond and the silicon substrate

and diamond grew directly on TaC

while the inherent mechanism was not clear. Here

a special coherent interface Diamond(111)//TaC(111) is observed using high resolution transmission electron microscopy

and then we explore the effects of the TaC with different lattice planes on the diamond formation by first-principle calculations. The results show that C tends to adsorb on the TaC(111) C-terminated surface. The strong covalent bond between C from diamond and Ta from TaC is formed in the Diamond(111)//TaC(111) interface

while only C–C covalent bonds are formed at the Graphite(002)/TaC(111). This makes diamond thermodynamically more stable than graphite on the TaC surfaces. Our investigations provide critical information to understand the complex diamond formation mechanism

especially with the presence of TaC.

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